单项选择题

Her address made a great impression ______ the audience.

A．at
B．of
C．in
D．on
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单项选择题
It is a common theme in many science fiction stories that the world may one day be ______ by insects.
A．broken in
B．run over
C．taken over
D．filled in
单项选择题
The jobs of wildlife technicians and biologists seemed ______to him, but one day he discovered their difference.
A．identical
B．vertical
C．parallel
D．specific
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